A Monte Carlo synthetic acceleration method for the non-linear, time-dependent diffusion equation

T. M. Evans, S. W. Mosher

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    3 Scopus citations

    Abstract

    We present a Monte Carlo synthetic-acceleration method for solving the time-dependent, nonlinear, equilibrium diffusion equation in three-dimensions. The new scheme uses the adjoint Monte Carlo method as a relaxation step that accelerates standard Jacobi iteration. Results show that this method is 40% faster than regular Jacobi iteration and is competitive with Jacobi-preconditioned Conjugate Gradient methods. Furthermore, the new method is not limited to symmetric, positive-definite systems, and therefore, it can be used for non-symmetric systems. Such systems arise in fully coupled, nonlinear-consistent (Newton) solvers.

    Original languageEnglish
    Title of host publicationAmerican Nuclear Society - International Conference on Mathematics, Computational Methods and Reactor Physics 2009, M and C 2009
    Pages1361-1370
    Number of pages10
    StatePublished - 2009
    EventInternational Conference on Mathematics, Computational Methods and Reactor Physics 2009, M and C 2009 - Saratoga Springs, NY, United States
    Duration: May 3 2009May 7 2009

    Publication series

    NameAmerican Nuclear Society - International Conference on Mathematics, Computational Methods and Reactor Physics 2009, M and C 2009
    Volume2

    Conference

    ConferenceInternational Conference on Mathematics, Computational Methods and Reactor Physics 2009, M and C 2009
    Country/TerritoryUnited States
    CitySaratoga Springs, NY
    Period05/3/0905/7/09

    Keywords

    • Linear solvers
    • Monte Carlo
    • Radiation diffusion
    • Synthetic acceleration

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